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STMicroelectronics STM32L451VEI6
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- Part No.:
- STM32L451VEI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-UFBGA
- Datasheet:
-
STM32L451VEI6.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 100UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,671
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Product details
Overview
STM32L451VEI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB Flash, 160 KB SRAM, and integrated analog peripherals including 12-bit ADC (5 Msps), dual 12-bit DAC, op-amp with PGA, and RTC with hardware calendar - deployed in battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L451VEI6 datasheet, STM32L451VEI6 pinout, STM32L451VEI6 application, or STM32L451VEI6 equivalent, key selection criteria include verified ultra-low-power modes (22 nA Shutdown, 375 nA Standby+RTC), 83 fast I/Os (most 5 V-tolerant), CAN 2.0B support, SAI audio interface, and UFBGA100 package compatibility with high-density PCB layouts.
Technical Context
The STM32L451VEI6 integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its dual PLL architecture supports independent clock domains for system, audio (SAI), and ADC subsystems.
Low-power operation is enforced via FlexPowerControl with seven distinct power modes - including Stop 2 (2.40 µA with RTC) and VBAT mode (145 nA) - and features like Batch Acquisition Mode (BAM) for sensor data bursts without CPU wake-up. The 32-bit core executes DSP instructions and leverages hardware parity on 32 KB of SRAM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time signal processing and floating-point math in resource-constrained edge nodes. |
| Memory | 512 KB Flash (single-bank), 160 KB SRAM (32 KB with hardware parity) - supports secure firmware storage and robust runtime data integrity. |
| Power Modes | 22 nA Shutdown, 106 nA Standby, 375 nA Standby+RTC, 2.40 µA Stop 2+RTC - extends battery life to multi-year operation in wireless sensor endpoints. |
| Analog Peripherals | 1× 12-bit ADC (5 Msps, 16-bit oversampling), 2× 12-bit DAC, 1× op-amp with PGA, 2× comparators - enables precision analog front-end for biometric or environmental sensing. |
| Communication | 1× SAI, 4× I²C (FM+), 4× USART/LPUART, 3× SPI + Quad-SPI, CAN 2.0B, SDMMC - supports simultaneous audio streaming, sensor aggregation, and fieldbus connectivity. |
| Timers & Control | 12 timers including 1× advanced motor-control TIM1, 2× low-power LPTIMs (active in Stop mode), SysTick, WWDG/IWDG - delivers precise timing for motor control, power management, and safety-critical watchdog supervision. |
| Package | UFBGA100 (7×7 mm, 0.5 mm pitch) - provides high I/O density and thermal performance for compact, fanless industrial modules. |
Pinout & Package
STM32L451VEI6 uses a 100-pin Ultra-Fine-Pitch Ball Grid Array (UFBGA100) package with 0.5 mm ball pitch and 7 mm × 7 mm body size, optimized for automated assembly and thermal dissipation in space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Main, analog, and I/O supply rails | Independent 1.71–3.6 V domains enable noise isolation between digital logic, analog converters, and 5 V-tolerant I/Os. |
| VSS, VSSA, VSSIO2 | Digital, analog, and I/O ground returns | Separate ground planes minimize coupling between high-speed switching and precision analog circuits. |
| PA0–PA15, PB0–PB15, etc. (83 total) | General-purpose I/Os | Most pins are 5 V-tolerant and support up to 16 alternate functions - simplifies level-shifting in mixed-voltage systems. |
| PC13–PC15 | RTC oscillator inputs/outputs | Support external 32.768 kHz crystal for autonomous calendar/timekeeping during Standby and VBAT modes. |
| PD0–PD2 | USART2 TX/RX/CK | Dedicated low-energy UART interface with LIN/IRDA support - enables firmware updates and diagnostics over legacy automotive buses. |
| PH0–PH1 | HSE oscillator inputs | Accept 4–48 MHz external crystal for high-accuracy system clock - critical for USB, audio, and time-sensitive communication. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven configurable low-power modes with sub-µA quiescent current - enables energy harvesting and coin-cell operation in IoT endpoints. |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates CPU stalls during code fetch, improving real-time determinism without external RAM. |
| Batch Acquisition Mode (BAM) | Peripheral-triggered ADC/DAC capture without CPU intervention - reduces active time and extends battery life in periodic sensing applications. |
| True Random Number Generator (RNG) | FIPS-compliant entropy source - satisfies cryptographic key generation requirements for secure boot and TLS handshake in connected devices. |
| Hardware CRC unit & 96-bit UID | Dedicated CRC32 engine and factory-programmed unique ID - accelerates firmware signature verification and device identity binding in OTA update workflows. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Wireless temperature/humidity/pressure node in predictive maintenance systems, powered by CR2032 or energy harvester. IC Role / Device Role / Timing Role: Main controller executing sensor fusion, BLE stack, and low-power scheduling - managing ADC sampling, RTC alarms, and LPUART wake-up events. Use Value: 22 nA Shutdown and 4 µs wakeup from Stop mode ensure >5-year battery life while maintaining sub-second responsiveness to sensor triggers. |
Use Scenario: Handheld ECG or pulse oximeter with real-time waveform display, local storage, and Bluetooth telemetry. IC Role / Device Role / Timing Role: Signal processor handling analog front-end (op-amp + ADC), digital filtering (DSP instructions), and SAI-driven audio feedback. Use Value: Integrated 12-bit DAC and op-amp with PGA eliminate external signal conditioning components, reducing BOM cost and board area by 30%. |
| Smart Meter Interface Module | Automotive Body Control Unit (BCU) |
Use Scenario: Sub-metering gateway aggregating gas/water/electricity readings via RS-485, M-Bus, and LoRaWAN. IC Role / Device Role / Timing Role: Protocol translator and data concentrator - running multiple UARTs, CAN, and SDMMC for local logging. Use Value: Dual PLLs and 4× I²C FM+ interfaces allow concurrent meter communication, secure element interfacing, and real-time clock synchronization. |
Use Scenario: Low-power door module managing window lift, mirror fold, and interior lighting with LIN and CAN bus integration. IC Role / Device Role / Timing Role: Power-aware microcontroller coordinating PWM motor drivers, capacitive touch (TSC), and LIN transceiver wake-up. Use Value: 21-channel capacitive sensing and 5 V-tolerant GPIOs enable direct connection to automotive switches and actuators without level shifters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L476RG | Higher Flash (1 MB), larger SRAM (128 KB), no SAI, added USB OTG FS - same UFBGA100 footprint but higher active current (108 µA/MHz vs. 84 µA/MHz). | Better suited for USB-hosted HMI or firmware-over-the-air (FOTA) with local caching - less optimal for strict sub-µA standby requirements. | Select when USB connectivity or larger code space outweighs lowest possible shutdown current. |
| STM32L552RE | ARMv8-M TrustZone®, 256 KB Flash, 256 KB SRAM, enhanced security peripherals - 3.3 V only, no 5 V-tolerant I/Os, 320 nA Standby+RTC. | Designed for secure boot, encrypted storage, and PSA-certified applications - requires redesign for voltage tolerance and peripheral mapping. | Choose for applications requiring certified hardware root-of-trust, accepting trade-offs in I/O flexibility and ultra-low-power analog integration. |
Compared with STM32L476RG and STM32L552RE, the STM32L451VEI6 offers the lowest standby+RTC current (375 nA) and richest analog integration (op-amp + PGA + dual DAC) in its class - making it optimal for cost-sensitive, battery-operated sensor nodes where security and USB are secondary to energy efficiency and analog signal chain simplicity.
Availability
STM32L451VEI6 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter interface modules, and automotive body control units requiring stable component supply across extended product lifecycles.
Supply support for STM32L451VEI6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and automotive semiconductors since 1987.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance per microwatt - specifically engineered for battery-powered IoT endpoints, wearable health devices, and energy-conscious industrial automation.
FAQ
What is the maximum operating frequency and associated performance metric of the STM32L451VEI6?
The STM32L451VEI6 operates at up to 80 MHz with an Arm Cortex-M4 core featuring FPU and DSP extensions, delivering 100 DMIPS and 273.55 CoreMark® (3.42 CoreMark/MHz). Its ART Accelerator™ ensures zero-wait-state execution from Flash, maintaining deterministic timing for real-time control loops.
Does the STM32L451VEI6 support true hardware random number generation?
Yes, it integrates a FIPS-compliant True Random Number Generator (RNG) based on analog entropy sources, validated per NIST SP800-90B. The RNG output is accessible via dedicated registers and used by ST's HAL libraries for secure key derivation in TLS and AES operations.
Which low-power modes retain RTC functionality and what are their current draws?
Standby mode with RTC consumes 375 nA, and Stop 2 mode with RTC draws 2.40 µA. Both preserve the hardware calendar, alarm registers, and 32×32-bit backup SRAM. VBAT mode (145 nA) maintains RTC and backup registers independently when main supply is removed.
Is the STM32L451VEI6 pin-compatible with other members of the STM32L451xx family?
Yes - all STM32L451xx variants sharing the UFBGA100 package (e.g., STM32L451VET6, STM32L451VET3) use identical pinouts and electrical characteristics. Memory size differences (e.g., 256 KB vs. 512 KB Flash) do not affect physical or functional pin mapping.
STM32L451VEI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-UFBGA
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 83
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 160K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L451VEI6 FAQ
1.How can I place an order for STM32L451VEI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L451VEI6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32L451VEI6 reliable?
The price and inventory of STM32L451VEI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L451VEI6 is usually 5 days.
3.What payment methods are accepted for STM32L451VEI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L451VEI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L451VEI6?
STM32L451VEI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L451VEI6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32L451VEI6?
For technical support, including STM32L451VEI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L451VEI6 requirements.
6.How does Aetrix verify that STM32L451VEI6 is sourced from the original manufacturer or authorized distributors?
All STM32L451VEI6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L451VEI6 meets industry standards.
7.What is the process for return or replacement of STM32L451VEI6?
All STM32L451VEI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L451VEI6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32L451VEI6 part is unused and in its original packaging.
Return procedure for STM32L451VEI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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